[osg-users] How should I organize the scene graph to handle 2 million points and lines?

J.P. Delport jpdelport at csir.co.za
Mon Nov 2 23:16:18 PST 2009


Angus Lau wrote:
> Hi,
> Thank you for your suggestions! I think the scribe effect is probably
> what I want for selection.
> You mentioned something about unreferencing data on the CPU side once
> it is uploaded. I am quite interested in this. Could you please give
> me more details?

A search for "UnRef" in the OSG includes will give you some details. 
I've only used this with textures though, so to be honest I don't know 
if similar techniques can be used for other data.

> Honestly speaking, the 2 million points and lines are probably not
> the largest dataset I will encounter. During the last few days, I
> discovered that my viewer probably has an acceptable performance, but
> the large amount of memory that it uses is probably the main issue I
> need to deal with. If there are some ways that can reduce the size of
> the scene graph or cache inactive part of the scene graph on disk, I
> would like to give them a try.

When you say memory do you mean CPU/GPU? PagedLOD can maybe help with this.


> Thank you!
> Cheers, Angus
> ------------------ Read this topic online here: 
> http://forum.openscenegraph.org/viewtopic.php?p=19076#19076
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